CN113781750B

CN113781750B - Novel gas alarm device for community

Info

Publication number: CN113781750B
Application number: CN202111064243.8A
Authority: CN
Inventors: 武亚彬; 曾锦
Original assignee: Shenzhen Xiangming Technology Co ltd
Current assignee: Shenzhen Xiangming Technology Co ltd
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2023-05-09
Anticipated expiration: 2041-09-10
Also published as: CN113781750A

Abstract

The invention discloses a novel gas alarm device for communities, which comprises a box body, a suction device, an adjusting device and a cleaning mechanism, wherein a box cover is fixedly connected to the box body, a first air inlet is formed in the box cover, the suction device is arranged in the box body and is used for pumping indoor air into the box body for detection, the adjusting device is arranged in the box body and is used for adjusting the opening size and the air inlet quantity of the first air inlet in a linkage manner according to the running state of the suction device, the cleaning mechanism is arranged in the box body and is used for cleaning the first air inlet in a linkage manner when the suction device runs, and the first air inlets in different opening states can be matched for cleaning.

Description

Novel gas alarm device for community

Technical Field

The invention relates to the technical field of gas alarm devices, in particular to a novel gas alarm device for communities.

Background

The gas alarm is a gas leakage detection alarm instrument. When gas leaks in the industrial environment, the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the gas alarm can send an alarm signal to remind workers to take safety measures, the gas alarm is equivalent to an automatic fire extinguisher, and an exhaust, cutting-off and spraying system can be installed to prevent explosion, fire and poisoning accidents, so that the safety production is ensured. The gas alarm can measure various gas concentrations. Is often used in chemical plants, petroleum, gas stations, steel plants and other places where gas leaks.

The electrochemical gas sensor is a detector for measuring the concentration of the object gas by oxidizing or reducing the object gas at the electrode to measure the current. The gas electrochemical gas sensor is an electrochemical gas sensor that specifically detects methane concentration. The laser gas sensor is a gas sensor developed based on a tunable laser spectrum absorption (TDLAS) principle, and is free from the influence of ambient temperature and humidity and free from the influence of interfering gases by the molecular absorption wavelength of the gases, independence of temperature and pressure and the wavelength absorption characteristic of noninterference between different gas molecules.

The problem of gas leakage in community and family is interesting equally, and current novel gas alarm device for community only has the effect of detection and warning, but once the indoor gas after the warning can not get timely discharge, gas concentration can rise constantly to cause comparatively serious potential safety hazard, is unfavorable for the safety of community. For this reason, we propose a new gas alarm device for communities.

Disclosure of Invention

The invention aims to provide a novel gas alarm device for communities, which is convenient for rapidly discharging gas outdoors when the concentration of the gas exceeds the standard, so as to solve the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a novel gas alarm device for community, includes box body, air suction device, adjusting device and clean mechanism, fixedly connected with lid on the box body, set up first air intake on the lid, fixedly connected with on the box body rather than the ventilation pipe that is linked together, fixedly connected with gas detection sensor and alarm in the box body, the alarm with gas detection sensor electric connection, air suction device installs in the box body for with indoor air pumping to the box body is inside detects, adjusting device installs in the box body, is used for according to air suction device's running state linkage is adjusted opening size and the intake of first air intake, clean mechanism installs in the box body, be used for when air suction device operates to clean with first air intake, and can adapt to different opening states first carry out the cleaning, the device through setting up air suction device, can absorb and detect indoor air under conventional state, be convenient for detect indoor gas concentration standard more, and when the air suction device's running state linkage is adjusted opening size and intake, thereby can make the air suction device is convenient for the exhaust in the high-speed of gas and the air inlet, and the air suction device is used for the improvement of the high-speed, and the air suction device is convenient to be used in the indoor exhaust.

Preferably, the air suction device comprises a motor frame fixedly mounted on the box body, a motor is fixedly connected to the motor frame, a fan blade is fixedly connected to the output end of the motor, a controller which is electrically connected with the gas detection sensor and used for controlling the rotating speed of the motor is arranged in the box body, and indoor air is conveniently pumped into the box body for detection.

Preferably, the adjusting device comprises a first belt, the coaxial fixedly connected with action wheel of motor output, rotate in the box body and be connected with from the driving wheel, first belt with the action wheel with from equal transmission connection of driving wheel, sliding connection has the baffle in the box body, the inside both sides of box body are all fixedly connected with fixed block, the bottom fixedly connected with of fixed block with baffle fixedly connected with's first extension spring, the second air intake has been seted up on the baffle, be equipped with on the driving wheel and be used for according to motor rotational speed is adjusted the second air intake with the link gear of first air intake overlap degree, be convenient for drive the opening size and the intake of adjusting first air intake through the rotation of motor output.

Preferably, the linkage mechanism comprises a first pull rope and a rotating box fixedly arranged on the driven wheel, a first sliding groove is formed in the rotating box, a centrifugal block is connected in the first sliding groove in a sliding mode, a second tension spring fixedly connected with the top of the first sliding groove is fixedly connected to the centrifugal block, an L-shaped groove is formed in the bottom of the rotating box, a rotating pipe is fixedly connected to the side face of the rotating box, a second sliding groove is formed in the rotating pipe, one end of the first pull rope is fixedly connected with the bottom surface of the centrifugal block, the other end of the first pull rope is fixedly connected with a limiting block which is in sliding connection with the inner wall of the rotating pipe, the limiting block is in sliding connection with the second sliding groove, and a pulling piece which is used for pulling up the baffle when the motor reaches a certain rotating speed and reducing the degree of overlap between the first air inlet and the second air inlet is convenient to carry out linkage operation by using centrifugal force.

Preferably, the pulling piece comprises a second pull rope and a third tension spring fixedly arranged at one end in the rotating pipe, the third tension spring is fixedly connected with one end of the limiting block, the limiting block is fixedly connected with a rotating shaft, the rotating shaft is fixedly connected with a pulling disc, a first through hole is formed in the rotating pipe, a limiting rod is fixedly connected with a box cover, a telescopic pipe is slidably connected to the limiting rod, the inner diameter of the telescopic pipe is slightly larger than the diameter of the pulling disc, one end of the telescopic pipe is provided with a second through hole with a diameter smaller than the diameter of the pulling disc, the diameters of the first through hole and the second through hole are slightly larger than the diameter of the rotating shaft, and a roller used for changing the pulling direction of the second pull rope is rotationally connected to the limiting rod so as to drive the baffle to lift.

Preferably, the cleaning mechanism comprises a sliding rod and a guide rod fixedly installed in the box body, a reciprocating screw rod is rotationally connected in the box body, the sliding rod is in sliding connection with the guide rod and in threaded connection with the reciprocating screw rod, a driving piece used for driving the sliding rod to rotate through rotation of the motor is arranged on the reciprocating screw rod, a cleaning piece used for cleaning the first air inlet and the second air inlet is arranged on the sliding rod, and the first air inlet and the second air inlet are conveniently cleaned by rotation of an output end of the motor.

Preferably, the driving piece comprises a second belt and a third belt, a first gear is coaxially and fixedly connected to the driven wheel, a second gear meshed with the first gear is rotationally connected in the box body, a first bevel gear and a second bevel gear are rotationally connected in the box body, the first bevel gear is meshed with the second bevel gear, the second belt is in transmission connection with the second gear and the first bevel gear, and the third belt is in transmission connection with the second bevel gear and the reciprocating screw rod, so that the cleaning piece can be conveniently cleaned by rotating and linkage of the output end of the motor.

Preferably, the cleaning member comprises a plurality of first cleaning brushes fixedly mounted on the sliding rod, the first cleaning brushes are in sliding connection with the lower surface of the first air inlet, a third sliding groove is formed in the sliding rod, a second cleaning brush is connected in the third sliding groove in a sliding manner, the second cleaning brush is connected with the upper surface of the second air inlet in a sliding manner, and springs fixedly connected with the second cleaning brushes are fixedly connected in the third sliding groove, so that the cleaning is convenient to adapt to different overlapping degrees of the first air inlet and the second air inlet.

Preferably, the centrifugal block is made of osmium alloy material, and has larger density and larger mass with the same volume, so that the centrifugal force with the same rotating speed is increased.

Compared with the prior art, the invention has the beneficial effects that:

the invention solves the problem that the existing novel gas alarm device for communities is difficult to discharge gas in time after detecting that the concentration of the indoor gas exceeds the standard, and the device can absorb and detect the indoor air by adopting smaller suction force under the conventional state by arranging the air suction device, so that the indoor gas concentration is more convenient to detect, and the air suction rate can be accelerated after the concentration of the gas exceeds the standard, thereby being convenient to discharge the indoor high-concentration gas, and arranging the adjusting device, and the air inlet is conveniently enlarged in the state of rapid air suction, so that the discharge efficiency of the indoor gas is higher, the working efficiency and the safety are improved, and the device is convenient for people to use.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the present invention;

FIG. 3 is an enlarged view of area A of FIG. 2;

FIG. 4 is a schematic diagram of the structure of the air suction device of the present invention;

FIG. 5 is an enlarged view of area B of FIG. 4;

FIG. 6 is a schematic view of a cleaning mechanism according to the present invention;

FIG. 7 is an enlarged view of region C of FIG. 6;

FIG. 8 is an enlarged view of area D of FIG. 6;

FIG. 9 is a schematic view of the structure of the adjusting device of the present invention;

FIG. 10 is an enlarged view of area E of FIG. 9;

fig. 11 is an enlarged view of region F in fig. 10.

In the figure: 1-a box body; 2-a box cover; 3-a first air inlet; 4-ventilation pipe; 5-a gas detection sensor; 6-an alarm; 7-an air suction device; 8-adjusting means; 9-a cleaning mechanism; 10-a motor frame; 11-an electric motor; 12-fan blades; 13-a controller; 14-a first belt; 15-a driving wheel; 16-driven wheel; 17-baffle; 18-fixing blocks; 19-a first tension spring; 20-a second air inlet; 21-a linkage mechanism; 22-a first pull rope; 23-rotating the box; 24-a first chute; 25-centrifuging blocks; 26-a second tension spring; a 27-L-shaped groove; 28-rotating the tube; 29-a second chute; 30-limiting blocks; 31-a pulling member; 32-a second pull cord; 33-a third tension spring; 34-rotating shaft; 35-pulling the disc; 36-a first through hole; 37-limit rod; 38-telescopic tube; 39-a second through hole; 40-rolling shafts; 41-a sliding rod; 42-a guide rod; 43-a reciprocating screw rod; 44-a driving member; 45-cleaning member; 46-a second belt; 47-a third belt; 48-a first gear; 49-a second gear; 50-a first bevel gear; 51-a second bevel gear; 52-a first cleaning brush; 53-a third chute; 54-a second cleaning brush; 55-spring.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1-11, a novel gas alarm device for communities in the drawings comprises a box body 1, a suction device 7, an adjusting device 8 and a cleaning mechanism 9, wherein a box cover 2 is fixedly connected to the box body 1, a first air inlet 3 is formed in the box cover 2, a ventilation pipe 4 communicated with the box body 1 is fixedly connected to the box body 1, a gas detection sensor 5 and an alarm 6 are fixedly connected to the box body 1, the alarm 6 is electrically connected with the gas detection sensor 5, the suction device 7 is installed in the box body 1 and used for pumping indoor air into the box body 1 for detection, the adjusting device 8 is installed in the box body 1 and used for adjusting the opening size and the air inlet quantity of the first air inlet 3 in a linkage mode according to the running state of the suction device 7, and the cleaning mechanism 9 is installed in the box body 1 and used for cleaning the first air inlet 3 in a linkage mode when the suction device 7 runs and can adapt to the first air inlet 3 in different opening states.

The air suction device 7 comprises a motor frame 10 fixedly arranged on the box body 1, a motor 11 is fixedly connected to the motor frame 10, a fan blade 12 is fixedly connected to the output end of the motor 11, and a controller 13 which is electrically connected with the gas detection sensor 5 and used for controlling the rotating speed of the motor 11 is arranged in the box body 1.

The regulating device 8 comprises a first belt 14, the output end of a motor 11 is coaxially and fixedly connected with a driving wheel 15, the inside of the box body 1 is rotationally connected with a driven wheel 16, the first belt 14 is in transmission connection with the driving wheel 15 and the driven wheel 16, a baffle 17 is in sliding connection with the inside of the box body 1, two sides of the inside of the box body 1 are fixedly connected with fixed blocks 18, the bottom of each fixed block 18 is fixedly connected with a first tension spring 19 fixedly connected with the baffle 17, a second air inlet 20 is formed in the baffle 17, and a linkage mechanism 21 for regulating the overlapping degree of the second air inlet 20 and the first air inlet 3 according to the rotating speed of the motor 11 is arranged on the driven wheel 16.

The linkage mechanism 21 comprises a first pull rope 22 and a rotating box 23 fixedly arranged on the driven wheel 16, a first sliding groove 24 is formed in the rotating box 23, a centrifugal block 25 is connected in the first sliding groove 24 in a sliding mode, a second tension spring 26 fixedly connected with the top of the first sliding groove 24 is fixedly connected to the centrifugal block 25, an L-shaped groove 27 is formed in the bottom of the rotating box 23, a rotating pipe 28 is fixedly connected to the side face of the rotating box 23, a second sliding groove 29 is formed in the rotating pipe 28, one end of the first pull rope 22 is fixedly connected with the bottom face of the centrifugal block 25, the other end of the first pull rope 22 is fixedly connected with a limiting block 30 which is in sliding connection with the inner wall of the rotating pipe 28, the limiting block 30 is in sliding connection with the second sliding groove 29, and a pulling piece 31 used for pulling up the baffle 17 when the motor 11 reaches a certain rotating speed is arranged on the limiting block 30, and the overlapping degree between the first air inlet 3 and the second air inlet 20 is reduced.

The pulling piece 31 comprises a second pulling rope 32 and a third tension spring 33 fixedly arranged at one end in the rotating tube 28, the third tension spring 33 is fixedly connected with one end of the limiting block 30, a rotating shaft 34 is fixedly connected to the limiting block 30, a pulling disc 35 is fixedly connected to the rotating shaft 34, a first through hole 36 is formed in the rotating tube 28, a limiting rod 37 is fixedly connected to the box cover 2, a telescopic tube 38 is slidingly connected to the limiting rod 37, the inner diameter of the telescopic tube 38 is slightly larger than the diameter of the pulling disc 35, a second through hole 39 with the aperture smaller than the diameter of the pulling disc 35 is formed in one end of the telescopic tube 38, the apertures of the first through hole 36 and the second through hole 39 are both slightly larger than the diameter of the rotating shaft 34, and a roller 40 for changing the pulling direction of the second pulling rope 32 is rotationally connected to the limiting rod 37.

In order to increase the mass of the centrifugal block 25, so as to provide a larger centrifugal force, the centrifugal block 25 is made of osmium alloy.

In this embodiment, the type of the motor 11 is preferably LD60 micro motor 11, a hole leading to the outside is drilled on the wall, the ventilation pipe 4 is inserted into the hole and fixed, meanwhile, the box body 1 is fixedly installed on the wall, in a conventional state, the output end of the motor 11 rotates slowly, the motor 11 drives the fan blade 12 to rotate for exhausting air, the outside air is pumped into the box body 1 through the first air inlet 3 and the second air inlet 20, the gas detection sensor 5 detects the gas content in the air, when the gas content is normal, the air is slowly exhausted to the outside through the ventilation pipe 4 under the exhausting action of the fan blade 12, when the gas content exceeds the standard, the gas detection sensor 5 triggers the alarm 6 to give an alarm, meanwhile, the controller 13 drives the motor 11 to rotate in an accelerating way, the motor 11 drives the fan to rotate fast, and the exhausting efficiency can be accelerated, and thus the air with higher concentration gas in the room is exhausted outdoors;

meanwhile, the rotation of the output end of the motor 11 drives the driving wheel 15 to rotate, the driving wheel 15 drives the driven wheel 16 to rotate through the first belt 14, the rotating box 23 can be driven to rotate, the rotating box 23 rotates to enable the centrifugal block 25 to rotate to generate centrifugal force, the centrifugal block 25 compresses the second tension spring 26, meanwhile, the centrifugal block 25 pulls the first pull rope 22 to enable the limiting block 30 to slide, the third tension spring 33 stretches, the limiting block 30 drives the rotating shaft 34 and the pulling disc 35 to move together, meanwhile, the limiting block 30, the rotating shaft 34 and the pulling disc 35 can rotate along with the rotating box 23 and the rotating tube 28, at the moment, the rotating shaft 34 and the pulling disc 35 are not contacted with the telescopic tube 38, so that friction between the rotating shaft 34 and the pulling disc 35 is greatly reduced, when the output end of the motor 11 rotates fast to exhaust air, the centrifugal force of the centrifugal block 25 is increased, the first pull rope 22 pulls the moving distance of the limiting block 30 to be increased, the telescopic tube 38 can be pulled by touching one end of the telescopic tube 38, the telescopic tube 38 is driven by the telescopic tube 38 to enable the second pull rope 32 to pull the baffle 17 to move upwards, the first tension spring 19 is compressed, the overlapped part of the second air inlet 20 and the first air inlet 3 is increased, and accordingly, the indoor gas is discharged to a larger degree.

Example 2

Referring to fig. 4-11 for further description of embodiment 2, the cleaning mechanism 9 in this embodiment includes a sliding rod 41 and a guiding rod 42 fixedly installed in the box 1, a reciprocating screw 43 is rotatably connected to the box 1, the sliding rod 41 is slidably connected to the guiding rod 42 and is in threaded connection with the reciprocating screw 43, a driving member 44 for driving the sliding rod 43 to rotate by rotation of the motor 11 is disposed on the reciprocating screw 43, and a cleaning member 45 for cleaning the first air inlet 3 and the second air inlet 20 is disposed on the sliding rod 41.

The driving piece 44 comprises a second belt 46 and a third belt 47, a first gear 48 is coaxially and fixedly connected to the driven wheel 16, a second gear 49 meshed with the first gear 48 is rotatably connected to the box body 1, a first bevel gear 50 and a second bevel gear 51 are rotatably connected to the box body 1, the first bevel gear 50 is meshed with the second bevel gear 51, the second belt 46 is in transmission connection with the second gear 49 and the first bevel gear 50, and the third belt 47 is in transmission connection with the second bevel gear 51 and the reciprocating screw 43.

In this embodiment, the output end of the motor 11 rotates to drive the first gear 48 to rotate, the first gear 48 drives the second gear 49 to rotate, the second gear 49 drives the second belt 46 to rotate the first bevel gear 50, the first bevel gear 50 drives the second bevel gear 51 to rotate, the second bevel gear 51 drives the reciprocating screw 43 to rotate through the third belt 47, the reciprocating screw 43 drives the sliding rod 41 to reciprocate under the limiting action of the guide rod 42, and the cleaning member 45 can be driven to continuously clean the first air inlet 3 and the second air inlet 20, so that accumulated dust is prevented from affecting the air inlet quantity and the sensitivity of gas detection.

Example 3

Referring to fig. 6-8 for describing embodiment 3, in this embodiment, the cleaning member 45 in the drawings includes a plurality of first cleaning brushes 52 fixedly mounted on the sliding rod 41, the first cleaning brushes 52 are slidably connected with the lower surface of the first air inlet 3, a third sliding groove 53 is formed on the sliding rod 41, a second cleaning brush 54 is slidably connected with the third sliding groove 53, the second cleaning brush 54 is slidably connected with the upper surface of the second air inlet 20, and a spring 55 fixedly connected with the second cleaning brush 54 is fixedly connected in the third sliding groove 53.

In this embodiment, the sliding rod 41 moves to drive the first cleaning brush 52 and the second cleaning brush 54 to move together, the third sliding groove 53 and the spring 55 are arranged to enable the second cleaning brush 54 to be always propped against the lower edge of the second air inlet 20, the first cleaning brush 52 continuously brushes on the upper surface of the first air inlet 3, and when the second air inlet 20 moves upwards, the second cleaning brush 54 also moves upwards to perform linkage cleaning.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel gas alarm device for community, characterized by comprising:

the gas detection device comprises a box body (1), wherein a box cover (2) is fixedly connected to the box body (1), a first air inlet (3) is formed in the box cover (2), a ventilation pipe (4) communicated with the box body (1) is fixedly connected to the box body (1), a gas detection sensor (5) and an alarm (6) are fixedly connected to the box body (1), and the alarm (6) is electrically connected with the gas detection sensor (5);

the air suction device (7) is arranged in the box body (1) and is used for sucking indoor air into the box body (1) for detection;

the adjusting device (8) is arranged in the box body (1) and is used for adjusting the opening size and the air inlet quantity of the first air inlet (3) in a linkage mode according to the running state of the air suction device (7);

the cleaning mechanism (9) is arranged in the box body (1) and is used for cleaning the first air inlet (3) when the air suction device (7) operates, and the cleaning mechanism (9) can be matched with the first air inlet (3) in different opening states to perform linkage cleaning;

the air suction device (7) comprises a motor frame (10) fixedly arranged on the box body (1), a motor (11) is fixedly connected to the motor frame (10), a fan blade (12) is fixedly connected to the output end of the motor (11), and a controller (13) which is electrically connected with the gas detection sensor (5) and used for controlling the rotating speed of the motor (11) is arranged in the box body (1);

the regulating device (8) comprises a first belt (14), a driving wheel (15) is coaxially and fixedly connected to the output end of the motor (11), a driven wheel (16) is rotationally connected to the box body (1), the first belt (14) is in transmission connection with the driving wheel (15) and the driven wheel (16), a baffle plate (17) is slidably connected to the box body (1), fixing blocks (18) are fixedly connected to two sides of the inside of the box body (1), a first tension spring (19) fixedly connected with the baffle plate (17) is fixedly connected to the bottom of the fixing blocks (18), a second air inlet (20) is formed in the baffle plate (17), and a linkage mechanism (21) used for regulating the overlapping degree of the second air inlet (20) and the first air inlet (3) according to the rotating speed of the motor (11) is arranged on the driven wheel (16).

The linkage mechanism (21) comprises a first pull rope (22) and a rotating box (23) fixedly arranged on the driven wheel (16), a first sliding groove (24) is formed in the rotating box (23), a centrifugal block (25) is connected in the first sliding groove (24) in a sliding mode, a second tension spring (26) fixedly connected with the top of the first sliding groove (24) is fixedly connected to the centrifugal block (25), an L-shaped groove (27) is formed in the bottom of the rotating box (23), a rotating pipe (28) is fixedly connected to the side face of the rotating box (23), a second sliding groove (29) is formed in the rotating pipe (28), one end of the first pull rope (22) is fixedly connected with the bottom face of the centrifugal block (25), a limiting block (30) which is connected with the inner wall of the rotating pipe (28) in a sliding mode is fixedly connected with the other end of the rotating pipe, and a limiting block (30) is provided with an air inlet (31) which is used for pulling the baffle (17) at a certain rotating speed up to a certain degree, and the first air inlet (3) is overlapped with the second air inlet (20);

the utility model provides a roller that pulling piece (31) include second stay cord (32) and fixed mounting are in third extension spring (33) of one end in pivoted tube (28), third extension spring (33) with one end fixed connection of stopper (30), fixedly connected with axis of rotation (34) on stopper (30), fixedly connected with pulling tray (35) on axis of rotation (34), first through-hole (36) have been seted up on pivoted tube (28), fixedly connected with gag lever post (37) on lid (2), sliding connection has flexible pipe (38) on gag lever post (37), the internal diameter of flexible pipe (38) is slightly greater than the diameter of pulling tray (35), second through-hole (39) of aperture less than pulling tray (35) diameter are seted up to the one end of flexible pipe (38), first through-hole (36) with the aperture of second through-hole (39) is slightly greater than the diameter of pulling tray (34), rotate on gag lever post (37) and be connected with on and be used for changing second (32) pulling roller (40) direction.

2. The novel gas alarm device for communities according to claim 1, wherein: the cleaning mechanism (9) comprises a sliding rod (41) and a guide rod (42) fixedly installed in the box body (1), a reciprocating screw rod (43) is rotationally connected to the box body (1), the sliding rod (41) is slidably connected with the guide rod (42) and is in threaded connection with the reciprocating screw rod (43), a driving piece (44) for driving the motor (11) to rotate and move is arranged on the reciprocating screw rod (43), and a cleaning piece (45) for cleaning the first air inlet (3) and the second air inlet (20) is arranged on the sliding rod (41).

3. A novel gas alarm device for communities as in claim 2, wherein: the driving piece (44) comprises a second belt (46) and a third belt (47), a first gear (48) is coaxially and fixedly connected to the driven wheel (16), a second gear (49) meshed with the first gear (48) is rotationally connected to the box body (1), a first bevel gear (50) and a second bevel gear (51) are rotationally connected to the box body (1), the first bevel gear (50) is meshed with the second bevel gear (51), the second belt (46) is in transmission connection with the second gear (49) and the first bevel gear (50), and the third belt (47) is in transmission connection with the second bevel gear (51) and the reciprocating screw (43).

4. A novel gas alarm device for communities according to claim 3, wherein: the cleaning piece (45) comprises a plurality of first cleaning brushes (52) fixedly mounted on the sliding rod (41), the first cleaning brushes (52) are in sliding connection with the lower surface of the first air inlet (3), a third sliding groove (53) is formed in the sliding rod (41), a second cleaning brush (54) is connected in a sliding manner in the third sliding groove (53), the second cleaning brush (54) is in sliding connection with the upper surface of the second air inlet (20), and a spring (55) fixedly connected with the second cleaning brush (54) is fixedly connected in the third sliding groove (53).

5. The novel gas alarm device for communities according to claim 4, wherein: the centrifugal block (25) is made of osmium alloy materials.